The first stage in software development is to investigate, collect and provide all user requirements into a software requirements specification document (SRS’s). Diverse academic background, different experiences, and the limitations of knowledge possessed by the requirement engineer make possible mistakes in the creation of SRS’s documents. One of the most common mistakes in SRS’s document is the use of ambiguous words. This can certainly lead to misinterpretation and difficulties in understanding the software requirement that stakeholders to built in the software development process. The purpose of this research is to build an approach that gives recommendation improvement of ambiguous software requirement statement. The proposed method is a rule-based technique using n-gram language model. The reliability of the proposed method is evaluated using Gwet's AC1 statistical index. The analysis results of the proposed recommendation method have a better level of agreement proportion than the recommendation method using the n-gram frequency-based statistical technique. The proposed recommendation method has the highest Gwet's AC1 statistic value of 0.5263 with a moderate agreement proportion rate.